docs(design): remove SVG, use PNG logo only

SVG icon is no longer in use. public/logo.png (1024x1024 RGBA) is
the single logo asset. DESIGN.md updated accordingly: SVG snippet
removed, wordmark pattern and <head> references updated to PNG.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

node_modules/jiti/lib/index.js

@@ -0,0 +1,15 @@
+function onError(err) {
+  throw err; /* ↓ Check stack trace ↓ */
+}
+
+module.exports = function jiti(filename, opts) {
+  const jiti = require("../dist/jiti");
+
+  opts = { onError, ...opts };
+
+  if (!opts.transform) {
+    opts.transform = require("../dist/babel");
+  }
+
+  return jiti(filename, opts);
+};